Buffer overflow in Libass Project
CVE-2020-36430
libass 0.15.x before 0.15.1 has a heap-based buffer overflow in decode_chars (called from decode_font and process_text) because the wrong integer data type is used for subtraction.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (63.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Libass Project
- Fedoraproject Fedora — versions 34
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/google/oss-fuzz-vulns/blob/main/vulns/libass/OSV-2020-2099.yaml (Third Party Advisory)
- bugs.chromium.org/p/oss-fuzz/issues/detail (Patch, Third Party Advisory, Issue Tracking)
- github.com/libass/libass/commit/017137471d0043e0321e377ed8da48e45a3ec632 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202208-13 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-36430?
- CVE-2020-36430 is a high-severity vulnerability in Libass Project, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-07-20.
- How severe is CVE-2020-36430?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2020-36430 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.